The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2007
Filed:
Dec. 01, 2003
Applicants:
Volker Maywald, Ludwigshafen, DE;
Nico Hoffmann, Frankenthal, DE;
Michael Keil, Freinsheim, DE;
Uwe Josef Vogelbacher, Ludwigshafen, DE;
Jan Hendrik Wevers, Hohen-Suelzen, DE;
Inventors:
Volker Maywald, Ludwigshafen, DE;
Nico Hoffmann, Frankenthal, DE;
Michael Keil, Freinsheim, DE;
Uwe Josef Vogelbacher, Ludwigshafen, DE;
Jan Hendrik Wevers, Hohen-Suelzen, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 45/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for preparing benzophenones of the formula I, where X may be chlorine, hydroxyl, methoxy or C-C-alkylcarbonyloxy, and Y may be chlorine or bromine, by reacting an acid chloride of the formula II where X and Y are as defined above with 3,4,5-trimethoxytoluene, which comprises carrying out the reaction in the presence of